1 /*

     2  * Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.security.ssl;

    27 

    28 import java.util.ArrayList;

    29 import java.util.List;

    30 

    31 final class ExtensionType {

    32 

    33     final int id;

    34     final String name;

    35 

    36     private ExtensionType(int id, String name) {

    37         this.id = id;

    38         this.name = name;

    39     }

    40 

    41     @Override

    42     public String toString() {

    43         return name;

    44     }

    45 

    46     static List<ExtensionType> knownExtensions = new ArrayList<>(16);

    47 

    48     static ExtensionType get(int id) {

    49         for (ExtensionType ext : knownExtensions) {

    50             if (ext.id == id) {

    51                 return ext;

    52             }

    53         }

    54         return new ExtensionType(id, "type_" + id);

    55     }

    56 

    57     private static ExtensionType e(int id, String name) {

    58         ExtensionType ext = new ExtensionType(id, name);

    59         knownExtensions.add(ext);

    60         return ext;

    61     }

    62 

    63     // extensions defined in RFC 3546

    64     static final ExtensionType EXT_SERVER_NAME =

    65             e(0x0000, "server_name");            // IANA registry value: 0

    66     static final ExtensionType EXT_MAX_FRAGMENT_LENGTH =

    67             e(0x0001, "max_fragment_length");    // IANA registry value: 1

    68     static final ExtensionType EXT_CLIENT_CERTIFICATE_URL =

    69             e(0x0002, "client_certificate_url"); // IANA registry value: 2

    70     static final ExtensionType EXT_TRUSTED_CA_KEYS =

    71             e(0x0003, "trusted_ca_keys");        // IANA registry value: 3

    72     static final ExtensionType EXT_TRUNCATED_HMAC =

    73             e(0x0004, "truncated_hmac");         // IANA registry value: 4

    74     static final ExtensionType EXT_STATUS_REQUEST =

    75             e(0x0005, "status_request");         // IANA registry value: 5

    76 

    77     // extensions defined in RFC 4681

    78     static final ExtensionType EXT_USER_MAPPING =

    79             e(0x0006, "user_mapping");           // IANA registry value: 6

    80 

    81     // extensions defined in RFC 5081

    82     static final ExtensionType EXT_CERT_TYPE =

    83             e(0x0009, "cert_type");              // IANA registry value: 9

    84 

    85     // extensions defined in RFC 4492 (ECC) and RFC 7919 (FFDHE)

    86     static final ExtensionType EXT_SUPPORTED_GROUPS =

    87             e(0x000A, "supported_groups");       // IANA registry value: 10

    88     static final ExtensionType EXT_EC_POINT_FORMATS =

    89             e(0x000B, "ec_point_formats");       // IANA registry value: 11

    90 

    91     // extensions defined in RFC 5054

    92     static final ExtensionType EXT_SRP =

    93             e(0x000C, "srp");                    // IANA registry value: 12

    94 

    95     // extensions defined in RFC 5246

    96     static final ExtensionType EXT_SIGNATURE_ALGORITHMS =

    97             e(0x000D, "signature_algorithms");   // IANA registry value: 13

    98 

    99     // extension defined in RFC 7301 (ALPN)

   100     static final ExtensionType EXT_ALPN =

   101             e(0x0010, "application_layer_protocol_negotiation");

   102                                                  // IANA registry value: 16

   103 

   104     // extensions defined in RFC 6961

   105     static final ExtensionType EXT_STATUS_REQUEST_V2 =

   106             e(0x0011, "status_request_v2");      // IANA registry value: 17

   107 

   108     // extensions defined in RFC 7627

   109     static final ExtensionType EXT_EXTENDED_MASTER_SECRET =

   110             e(0x0017, "extended_master_secret"); // IANA registry value: 23

   111 

   112     // extensions defined in RFC 5746

   113     static final ExtensionType EXT_RENEGOTIATION_INFO =

   114             e(0xff01, "renegotiation_info");     // IANA registry value: 65281

   115 }